std::experimental::source_location::line
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std::experimental::source_location
Creation
Field Access
source_location::line
constexpr std::uint_least32_t line() const noexcept;
(library fundamentals TS v2)
Returns the line number represented by this object.
Contents
[edit] Parameters
(none)
[edit] Return value
The line number represented by this object.
[edit] Example
Run this code
#include <experimental/source_location> #include <iostream> #include <string_view> using std::experimental::source_location ; inline void cur_line( const std::string_view message = "", const source_location& location = source_location::current()) { std::cout << location.line() // <- the call-site line # << ") " << message; } int main() { cur_line("++" "\n"); cur_line(); std::cout << "Hello," "\n"; cur_line(); std::cout << "C++20!" "\n"; cur_line("--" "\n"); }
Output:
18) ++ 19) Hello, 20) C++20! 21) --
[edit] See also
C++ documentation for Filename and line information